Vulnerability Description
Multiple Stored XSS vulnerabilities exist in Seafile Server version 13.0.15,13.0.16-pro,12.0.14 and prior and fixed in 13.0.17, 13.0.17-pro, and 12.0.20-pro, via the Seadoc (sdoc) editor. The application fails to properly sanitize WebSocket messages regarding document structure updates. This allows authenticated remote attackers to inject malicious JavaScript payloads via the src attribute of embedded Excalidraw whiteboards or the href attribute of anchor tags
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Seafile | Seafile Server | < 12.0.20 |
Related Weaknesses (CWE)
References
- https://gist.github.com/gabdevele/1b7e30ab367b26042fa32f45aa12ce2fExploitThird Party Advisory
- https://github.com/haiwen/seadoc-editor/commit/8fa988aaede072b2ae073d1b2edcb2fc6Patch
- https://github.com/haiwen/seahub/commit/4c5301747bdb84c64b2f2b3230417df2d1cc8987Patch
- https://manual.seafile.com/12.0/changelog/changelog-for-seafile-professional-serRelease Notes
- https://manual.seafile.com/13.0/changelog/changelog-for-seafile-professional-serRelease Notes
- https://manual.seafile.com/13.0/changelog/server-changelog/Release Notes
FAQ
What is CVE-2026-30587?
CVE-2026-30587 is a vulnerability with a CVSS score of 8.7 (HIGH). Multiple Stored XSS vulnerabilities exist in Seafile Server version 13.0.15,13.0.16-pro,12.0.14 and prior and fixed in 13.0.17, 13.0.17-pro, and 12.0.20-pro, via the Seadoc (sdoc) editor. The applicat...
How severe is CVE-2026-30587?
CVE-2026-30587 has been rated HIGH with a CVSS base score of 8.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-30587?
Check the references section above for vendor advisories and patch information. Affected products include: Seafile Seafile Server.